Borrowing it
Nothing to install: this file belongs to greatSumini/cc-system. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/greatSumini/cc-system/main/.claude/skills/subagent-creator/SKILL.mdgit clone --depth 1 https://github.com/greatSumini/cc-systemWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/greatsumini/cc-system/subagent-creator)<a href="https://agentmods.dev/skills/greatsumini/cc-system/subagent-creator"><img src="https://agentmods.dev/badge/skills/greatsumini/cc-system/subagent-creator/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/greatsumini/cc-system/subagent-creator"><img src="https://agentmods.dev/badge/skills/greatsumini/cc-system/subagent-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 3 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.00924 |
| Opus 5.5 | $0.00020 | $0.00370 |
| Sonnet 5.5 | $0.00010 | $0.00185 |
| Haiku 4.5 | $0.00005 | $0.00092 |
Grade A, and why
subagent-creator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- subagent-creator — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sub-agent Creator
Create specialized AI sub-agents for Claude Code that handle specific tasks with customized prompts and tool access.
Sub-agent File Format
Sub-agents are Markdown files with YAML frontmatter stored in:
- Project:
.claude/agents/(higher priority) - User:
~/.claude/agents/(lower priority)
Structure
---
name: subagent-name
description: When to use this subagent (include "use proactively" for auto-delegation)
tools: Tool1, Tool2, Tool3 # Optional - inherits all if omitted
model: sonnet # Optional - sonnet/opus/haiku/inherit
permissionMode: default # Optional - default/acceptEdits/bypassPermissions/plan
skills: skill1, skill2 # Optional - auto-load skills
---
System prompt goes here. Define role, responsibilities, and behavior.
Configuration Fields
| Field | Required | Description |
|---|---|---|
name |
Yes | Lowercase with hyphens |
description |
Yes | Purpose and when to use (key for auto-delegation) |
tools |
No | Comma-separated tool list (omit to inherit all) |
model |
No | sonnet, opus, haiku, or inherit |
permissionMode |
No | default, acceptEdits, bypassPermissions, plan |
skills |
No | Skills to auto-load |
Creation Workflow
- Gather requirements: Ask about the sub-agent's purpose, when to use it, and required capabilities
- Choose scope: Project (
.claude/agents/) or user (~/.claude/agents/) - Define configuration: Name, description, tools, model
- Write system prompt: Clear role, responsibilities, and output format
- Create file: Write the
.mdfile to the appropriate location
Writing Effective Sub-agents
Description Best Practices
The description field is critical for automatic delegation:
# Good - specific triggers
description: Expert code reviewer. Use PROACTIVELY after writing or modifying code.
# Good - clear use cases
description: Debugging specialist for errors, test failures, and unexpected behavior.
# Bad - too vague
description: Helps with code
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 128 lines · 49 tokens per session scan A 533aae961067
subagent-creator is a skill published in the GitHub repository greatSumini/cc-system (438 stars, last pushed 4mo ago), licensed MIT. It adds 49 tokens to every session and 924 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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